Download - Tungsten HCal : Single Section Analysis
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Niall O Cuilleanain (Supervisor: H. Gerwig)
Tungsten HCal: Single Section Analysis
Initial results of improved structural integrity due to Tungsten plates
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Niall O Cuilleanain (Supervisor: H. Gerwig)
Model 1 (steel structure only): The Tungsten plates are represented by point masses- ‘dead weight’.
Model 2 (both steel structure & the connected Tungsten plates):Here we see a symmetrical half of a module of the Tungsten HCal.
Both models are supported at the section’s external face (3 or 9 o’clock position), and under Standard Gravity.
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Niall O Cuilleanain (Supervisor: H. Gerwig)
Model 1
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Niall O Cuilleanain (Supervisor: H. Gerwig)
Model 1 -Deformation
Max. Total Deformation: 2.97mm
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Niall O Cuilleanain (Supervisor: H. Gerwig)
Model 2
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Niall O Cuilleanain (Supervisor: H. Gerwig)
Model 2 - Deformation
Max. Total Deformation: 1.63mm
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Niall O Cuilleanain (Supervisor: H. Gerwig)
Model 1 v. Model 2
Max. Deformation: 2.97mm Max. Deformation: 1.63mm
c. -33%
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Niall O Cuilleanain (Supervisor: H. Gerwig)
Model 1
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Niall O Cuilleanain (Supervisor: H. Gerwig)
Model 1-Equivalent Stress distribution
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Niall O Cuilleanain (Supervisor: H. Gerwig)
Model 2
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Niall O Cuilleanain (Supervisor: H. Gerwig)
Model 2 – Eqv. Stress distribution (plates are ‘hidden’)
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Niall O Cuilleanain (Supervisor: H. Gerwig)
Model 2 – Eqv. Stress distribution
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Niall O Cuilleanain (Supervisor: H. Gerwig)
Model 1 v. Model 2
Max. Stress: 169MPa Max Stress: 63MPa
c. -63%
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Niall O Cuilleanain (Supervisor: H. Gerwig)
Conclusions- Main points
• The modulus of elasticity of the pure Tungsten plates were underestimated
E=350GPa, as opposed to E= c. 400GPa.
• The analyses must be redone with bolted rather than welded connections, which will inherently give smaller reductions.
• The presence of the brackets between each plate must be considered.
• These are promising initial results.
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Niall O Cuilleanain (Supervisor: H. Gerwig)
Where next?• After the single section analysis, I wish to compare the 2 models of the entire HCal structure, in order to analyze the reductions given;
i.e. Model 1 (including the point masses), and Model 2 (including the actual Tungsten plates), as we have seen here.
• How can we improve the structural integrity?
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Niall O Cuilleanain (Supervisor: H. Gerwig)
Other current analyses
• Crane support of a single section: -where best to support a single section? -how much does it deform in each case?
• Single Tungsten plate (12mm):-what deformations are produced when the
plate is supported in different ways & at different points?
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Niall O Cuilleanain (Supervisor: H. Gerwig)
Other current analyses
Entire HCal (Tungsten modeled by point masses): - What deformations and stresses are produced in the HCal? (supported at 3 & 9 o’clock positions)